[cantarell-fonts/ci-upgrade-pip] Upgrade pip before build

[Nikolaus Waxweiler <nwaxweiler src gnome org>]

commit 5c03439dc069be5c14ab4f0dc03ebe45acf00938
Author: Nikolaus Waxweiler <nikolaus waxweiler daltonmaag com>
Date:   Thu Oct 18 12:06:28 2018 +0100

    Upgrade pip before build
    
    Some packages out there expect it to respect pyproject.toml.

 .gitlab-ci.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ad232d18..2d5bf9e5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,6 +3,7 @@ image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/base:latest
 build:
   script:
     - dnf install -y libappstream-glib-devel gettext
+    - python3 -m pip install --upgrade pip
     - pip3 install fontmake psautohint meson ninja
     - meson build
     - ninja -C build install
@@ -20,4 +21,4 @@ build:
     paths:
       - build/meson-dist
       - prebuilt/*.otf
-    expire_in: 7 days
\ No newline at end of file
+    expire_in: 7 days